Clark County Climate
Clark County, Idaho
Avg Annual Temp
45.3°F
Annual Precip
12.2"
Annual Snowfall
47.3"
Extreme Heat Days
20.3
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Clark County Weather
A High-Altitude Cool Spot in the West
Clark County maintains a crisp annual average temperature of 45.3°F, notably cooler than the national median. This high-plateau climate sits in stark contrast to warmer southern regions of the country.
Cooler Than the Average Idaho County
With its 45.3°F average, Clark County runs roughly 1.2 degrees colder than the Idaho state average of 46.5°F. This makes it one of the more temperate but cooler jurisdictions in the Gem State.
Dry Skies Compared to Mountain Neighbors
The county receives just 12.2 inches of annual precipitation, which is significantly drier than the state average of 17.0 inches. While nearby Fremont County sees over 21 inches of moisture, Clark remains a semi-arid landscape.
Deep Freezes and Pleasant Summer Afternoons
Winters are biting with a January average of 22.2°F and 47.3 inches of annual snowfall. Summers stay mild with a July average of 70.7°F, though residents still face 20 days of heat over 90°F.
Prepare for Snow and Arid Air
Homeowners should prioritize high-quality insulation to handle the 23.4°F average winter temperatures. Because of the low 12.2-inch precipitation rate, drought-resistant landscaping is essential for local yards.
Frequently Asked Questions
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Data source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.